<template>
  <div class="login">
    <vue-particles
        class="login-bg"
        color='#39AFFD'
        :particleOpacity="0.7"
        :particlesNumber="100"
        shapeType="circle"
        :particleSize="4"
        linesColor="#8DD1FE"
        :linesWidth="1"
        :lineLinked="true"
        :lineOpacity="0.4"
        :linesDistance="150"
        :moveSpeed="3"
        :hoverEffect="true"
        hoverMode="grab"
        :clickEffect="true"
        clickMode="push"
    >
    </vue-particles>
    <!-- 登录面板 -->
    <div class="login-box">
      <div class="login-box-title">
        后台管理系统
      </div>
      <div class="login-box-from">
        <el-form :model="loginForm" :rules="rules" ref="loginForm" class="demo-ruleForm">
          <el-form-item prop="loginName">
            <el-input v-model="loginForm.loginName" placeholder="请输入用户名" size="medium">
              <el-button slot="prepend" icon="el-icon-user"></el-button>
            </el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input v-model="loginForm.password" type="password" placeholder="请输入密码" size="medium">
              <el-button slot="prepend" icon="el-icon-key"></el-button>
            </el-input>
          </el-form-item>
          <el-form-item>
            <el-button type="primary" size="medium" :loading="loading" style="width:100%"
                       @click="submitForm('loginForm')">立即登陆
            </el-button>
          </el-form-item>
        </el-form>
      </div>
    </div>

  </div>

</template>

<script>
export default {
  data() {
    let letterRule = (rule, value, callback) => {
      let reg = /^[a-zA-Z0-9_-]{4,18}$/
      if (value === '') {
        callback(new Error('输入内容不能为空'));
      } else if (!reg.test(value)) {
        callback(new Error('请输入字母、数字、下划线'));
      } else {
        callback();
      }
    };
    return {
      loading: false, //登陆状态
      loginForm: {  // 登陆表单内容
        loginName: 'ZM10020',
        password: 'a12345'
      },
      rules: {  //登陆验证规则
        loginName: [
          {required: true, message: '请输入用户名', trigger: 'blur'},
        ],
        password: [
          {required: true, message: '请输入密码', trigger: 'blur'},
          {min: 6, max: 16, message: '长度在 6 到 16 个字符', trigger: 'blur'},
          {validator: letterRule, trigger: 'blur'}
        ]
      }
    }
  },
  methods: {

    submitForm(formName) {
      this.$refs[formName].validate((valid) => {
        if (valid) {
          this.loading = true
          this.login()
        } else {
          return false;
        }
      });
    },
    login() {
      this.$store
          .dispatch('user/login', this.loginForm)
          .then(() => {
            this.loading = true
            // 登陆成功后重定向
            this.$router.push({
              path: this.$route.query.redirect || '/index'
            })
          })
          .catch(err => {
            this.loading = false
          })
    }
  }
}
</script>

<style scoped>
.login {
  width: 100%;
  height: 100%;
  /* display: flex;
  justify-content: center;
  align-items: center;
  background-image: url('../../assets/image/login.jpg');
  background-repeat: no-repeat;
  background-size: 100% 100%;
  color: #cccccc; */
  position: relative;
}

.login-bg {
  width: 100%;
  height: 100%;
  background: #3E3E3E;
}

.login-box {
  width: 350px;
  /* height: 287px; */
  background: hsla(0, 0%, 100%, .3);
  border-radius: 5px;
  box-shadow: 0 0 2px #f7f7f7;
  border: 1px solid #f7f7f7;
  position: absolute;
  left: 50%;
  top: 50%;
  margin-left: -175px;
  margin-top: -150px;

}

.login-box-title {
  line-height: 50px;
  font-size: 20px;
  color: #ffffff;
  text-align: center;
  border-bottom: 1px solid #ffffff;
}

.login-box-from {
  width: 100%;
  height: auto;
  padding: 30px;
  box-sizing: border-box;
}
</style>